Compression Ratio and Quench question.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
I'm beginning to think that my compression ratio is not as high as my engine shop promised it would be. I was told that it would be 10.2:1 while it seems to me that it would be closer to 9:1.
If I'm right, what kind of hp gain could I expect to see from milling the head to bring my motor up from 9:1 to 11:1?
Engine: 383ci SB, AFR 195cc Aluminum Angle Plug Heads, Comp Hyd Roller Cam & Lifters .520 in .540 ex Lift, 236in 242ex Duration @ .05, Edelbrock Victor Jr, Mighty Demon 750...
Also, I remember reading on Digital Corvettes that Quench is more important than Compression ratio. I remember reading that .039 was the best Quench to have. Is this true? Why? And how do you obtain it?
If I'm right, what kind of hp gain could I expect to see from milling the head to bring my motor up from 9:1 to 11:1?
Engine: 383ci SB, AFR 195cc Aluminum Angle Plug Heads, Comp Hyd Roller Cam & Lifters .520 in .540 ex Lift, 236in 242ex Duration @ .05, Edelbrock Victor Jr, Mighty Demon 750...
Also, I remember reading on Digital Corvettes that Quench is more important than Compression ratio. I remember reading that .039 was the best Quench to have. Is this true? Why? And how do you obtain it?
Check build #17 on this site: www.ryanscarpage.50megs.com/combos1.html
